What do you think you're doing?

你明白你在做什么吗?

Once you falter, you're done.

一旦你站不稳，你就完了。

[with clause]you should watch what you say!

你要小心你说的话！

You'll have time for a bite if you shift.

如果你赶快，你还有时间吃饭的。

You're tenacious and you get at the truth.

由于你的执着，你寻求到了真理。